US3212515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid amplifier
Assignee: Giannini Controls Corp
•
Filing: 1962-07-13
•
Granted: 1965-10-19
•
Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 Melvin B Zisfein
- 👤 Howard A Curtiss
- 👤 Glen E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/2169; Y10T137/218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PURE FLUDID AMPLIFIER COMPRISING IN COMBINATION STRUCTURE FORMING A SUBSTANTIALLY SMOOTHLY CONTINUOUS WALL SURFACE HAVING AT LEAST A LONGITUDINALLY INTERMEDIATE PORTION THAT IS CONVEXLY CURVED, MEANS FOR MOVING A FLUID POWER STREAM LONGITUDINALLY OF THE WALL SURFACE UNDER FLOW CONDITIONS CAUSING THE STREAM TO BE ATTACHED TO THE WALL SURFACE AT A REGION UPSTREAM OF AND CONTIGUOUS WITH SAID INTERMEDIATE PORTION AND TO SEPARATE FROM THE WALL SURFACE AT A POSITION WITHIN SAID INTERMEDIATE PORTION BY VIRTUE OF THE CONVEX CURVATURE THEREOF, SAID POWER STREAM FLOWING UNDER CONDITIONS OF INCIPIENT SEPARATION FROM THE SURFACE IN A REGION OF THE SURFACE ADJACENT SAID POSITION OF SEPARATION, STRUCTURE FORMING A CONTROL PASSAGE THAT OPENS INTO THE POWER STREAM CLOSELY AJDACENT SAID REGION OF INCIPIENT SEPARATION AND DOWNSTREAM OF SAID REGION OF ATTACHMENT,
Claim 2
Dependent Claim
131 words
A PURE FLUDID AMPLIFIER COMPRISING IN COMBINATION STRUCTURE FORMING A SUBSTANTIALLY SMOOTHLY CONTINUOUS WALL SURFACE HAVING AT LEAST A LONGITUDINALLY INTERMEDIATE PORTION THAT IS CONVEXLY CURVED, MEANS FOR MOVING A FLUID POWER STREAM LONGITUDINALLY OF THE WALL SURFACE UNDER FLOW CONDITIONS CAUSING THE STREAM TO BE ATTACHED TO THE WALL SURFACE AT A REGION UPSTREAM OF AND CONTIGUOUS WITH SAID INTERMEDIATE PORTION AND TO SEPARATE FROM THE WALL SURFACE AT A POSITION WITHIN SAID INTERMEDIATE PORTION BY VIRTUE OF THE CONVEX CURVATURE THEREOF, SAID POWER STREAM FLOWING UNDER CONDITIONS OF INCIPIENT SEPARATION FROM THE SURFACE IN A REGION OF THE SURFACE ADJACENT SAID POSITION OF SEPARATION, STRUCTURE FORMING A CONTROL PASSAGE THAT OPENS INTO THE POWER STREAM CLOSELY AJDACENT SAID REGION OF INCIPIENT SEPARATION AND DOWNSTREAM OF SAID REGION OF ATTACHMENT,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |